CVE-2026-58656

Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token from access logs, proxy logs, browser history, or Referrer headers can create persistent backdoor super-admin accounts and exfiltrate sensitive configuration and user data.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp
https://www.vulncheck.com/advisories/grav-api-plugin-cross-origin-admin-account-takeover-via-cors-wildcard-and-jwt-query-parameter
https://github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-08 14:17

Updated : 2026-07-08 17:17

NVD link : CVE-2026-58656

Mitre link : CVE-2026-58656

CVE.ORG link : CVE-2026-58656

JSON object : View

Products Affected

No product.

CWE

CWE-598

Use of HTTP Request With Sensitive Query String

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